The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 1996
Filed:
Feb. 08, 1994
Clemens Grund, Mannheim, DE;
Guenther Glas, Meckenheim, DE;
Paul Guenthert, Schifferstadt, DE;
Helmut Reichelt, Neustadt, DE;
Rainer Becker, Bad Duerkheim, DE;
Arno Lange, Bad Duerkheim, DE;
Klaus Friedrich, Schifferstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for the preparation of dicyanobenzenes of the formula ##STR1## in which x denotes hydroxy, C.sub.1 -C.sub.4 alkoxy, nitro, amino, mono- or di-(C.sub.1 -C.sub.4 alkyl)amino, phthalimido or a nitrogenous saturated 5-membered or 6-membered heterocyclic radical, which is attached to the phenyl ring via a nitrogen atom in which a xylene of the formula ##STR2## in which x has the meaning stated above, is oxidized at a temperature of from 400.degree. to 500.degree. C. with oxygen in the presence of ammonia and a catalyst.